What are Saturn's rings made of? In an effort to find out, the robot spacecraft Cassini that entered orbit around Saturn two weeks ago took several detailed images of the area surrounding Saturn's large A ring in ultraviolet light. In the above image, the bluer an area appears, the richer it is in water ice. Conversely, the redder an area appears, the richer it is in some sort of dirt.
Recent reports have accused the US military of irresponsible disposal of millions of pounds of hazardous waste, mostly from the Iraq war. But after investigating, the military says EPA standards are being upheld.
Scientist-astronaut Edward G. Gibson has just exited the Skylab extravehicular activity hatchway. Astronaut Gerald P. Carr, Skylab 4 commander, took this picture during the final Skylab spacewalk that took place on Feb. 3, 1974. Carr was above on the Apollo Telescope Mount when he shot this frame of Gibson.
This computer simulation is a data-based coronal loop model, constructed from magnetogram data collected by SOHO/MDI. The elegant loops are part of the sun's lower corona, and are caused by magnetic flux in the solar body.
Astronomers have long warned of a nasty encounter with a large space rock, but don't worry: There's a proposal in Congress to establish a commission to look into it.
This majestic view taken by NASA's Spitzer Space Telescope tells an untold story of life and death in the Eagle nebula, an industrious star-making factory located 7,000 light-years away in the Serpens constellation. The image shows the region's entire network of turbulent clouds and newborn stars in infrared light. The color green denotes cooler towers and fields of dust. Red represents hotter dust thought to have been warmed by the explosion of a massive star about 8,000 to 9,000 years ago.
This image from NASA's Terra satellite covers an area of 34 by 25 miles over the southwest part of the Malaspina Glacier and Icy Bay in Alaska. The composite of infrared and visible bands results in the snow and ice appearing light blue, dense vegetation is yellow-orange and green, and less vegetated, gravelly areas are in orange. The Malaspina Glacier is currently thinning. Its terminal moraine protects it from contact with the open ocean; without the moraine, or if sea level rises sufficiently to reconnect the glacier with the ocean, the glacier would start calving and retreat significantly.
A Kashmiri fisherman sits on his boat as the sun sets over the Dal Lake in Srinagar, India, on Friday. Authorities reimposed a rigid curfew throughout most of Kashmir to prevent street protests after Friday prayers following weeks of unrest that has killed 15 people.
As more Indians pack into already crowded cities, developers are wooing wealthy urbanites with private towns boasting amenities like gardens, pools, walkable streets, schools, and a golf academy.
An open letter to Congress signed by 24 former NASA astronauts told Congress that privately owned spacecraft could carry people safely to the International Space Station.